diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index c55ae0e..f91e22f 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1469,7 +1469,10 @@
 		tp->lost_cnt_hint -= tcp_skb_pcount(prev);
 	}
 
-	TCP_SKB_CB(skb)->tcp_flags |= TCP_SKB_CB(prev)->tcp_flags;
+	TCP_SKB_CB(prev)->tcp_flags |= TCP_SKB_CB(skb)->tcp_flags;
+	if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN)
+		TCP_SKB_CB(prev)->end_seq++;
+
 	if (skb == tcp_highest_sack(sk))
 		tcp_advance_highest_sack(sk, skb);